Tranquila is available in two varieties, with quite different formulations (but both with zero calories, sweetened with sucralose). We tasted both.

Tranquila Original includes Vitamins B3, B6, B12, Folate, GABA, N-Acetyl L-Tyrosine, L-Theanine, Rhodiola Rosea Flower Extract, Rhaponticum Carthamoides Extract, and — get ready for this one — Eleutherococcus Senticoccus Root Extract. I have no idea what most of that stuff is, but the idea is to improve overall mood, boost immune system response, and combat stress. The flavor is very tart lemon-lime, quite sweet, and not all that bad. A bit like a flat Mountain Dew with five sugar cubes mixed in. Hard to tell if I felt “calmer” or more immune to anything after consuming the concoction, but it certainly didn’t hurt. C

Tranquila PM has a much different makeup: Vitamin B6, Zinc, Magnesium, Phenibut, L-Theanine, and — the kicker — Melatonin. As you might have guessed by the name and the lattermost ingredient, the idea is not just to improve overall mood, boost immune system response, and combat stress, but to put you to sleep too. The taste is better, less sweet than the Original but still quite tart and lemon-lime in essence. Unlike the Original, Tranquila PM’s effects were powerful and rather immediate. I was crashing to sleep in about 15 minutes. In fact, I had a hell of a time getting up the next morning: It’s unclear how much melatonin is in each vial, but I was dragging for a couple of hours after waking. Maybe that’s a good thing. Your mileage (and opinion about that) may vary. B